Table 4.

Parameter estimates and type-III-test based p-values of fixed effects of the secondary endpoints saliva pH, dentin hypersensitivity (DHS), and discolorations (DC).

	Estimate	Saliva pH Std.error	p-value	Estimate	DHS Std.error	p-value	Estimate	DC Std.error	p-value
Group (intervention SnCl2)			0.1034			0.1693			*0.0010
Time of examination			0.5209			0.0970			*0.0155
Group*time of examination			0.3761			0.9323			0.7147
BEWE at baseline examination	0.0151	0.0138	0.2812	−0.0463	0.0833	0.5809	−0.0033	0.0157	0.8351
pH value at baseline examination	0.5303	0.1188	** < 0.0001	−0.1077	0.7176	0.8814	0.0860	0.1348	0.5274
Hypersensitivity at baseline examination	−0.0184	0.0180	0.3141	0.4976	0.1142	** < 0.0001	−0.0109	0.0207	0.5988

Note: Due to the variables’ cateogrical scale level, estimates for time and the treatment group*time interaction are not provided.